Stem-winding watch



(Model) J. G. GARNAHAN.

STEM WINDING WATCH.

Patented Oct. 4,1881,

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WITNESSES: INVENTOR: w Q j N. PETERS. PllalO-Lllhagmphcr. waihiu wn. D. c.

- UNITED STATES PATENT I OFFICE.

JOHN G. OARNAHAN, OF OXFORD, INDIANA.

I STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent No. 247,884, dated October 4, 1881.

Application filed January 8,1881. (Model) To all whom it may concern Be it known that 1, JOHN G. CARNAHAN, of Oxford, in the county of Benton and State of Indiana, have invented a new and useful Improvement in Stein Winding \Vatches, of which the following is a specification.

My invention relates to that class of stemwinding watches in which the winding and hand-setting mechanism is engaged with the gearing for winding up the mainspring and the gearing for setting the hands by the longitudinal movement of the stem.

In the accompanying drawings, Figure l is a plan view of the winding and setting mechanism attached to the movement of a watch, with the case shown in section, and Fig. 2 is a crossscction through the movement of the watch, showing only the upper and lower plates.

Similar letters of reference indicate correspondin g parts.

The case A of the watch is formed with the ordinary ringandpendant,theopeningthrough the latter being somewhat enlarged at the top to admit the adjustable annulus c, by which the stem B is held in place, the groove 8 permitting it to be revolved and moved longitudinally.

The lower part of the shank of the stem is squared at b and provided with the grooved collar 6, which engages with the threaded projection d in the short arm of the bent lever O, the part of the stem below the collar 6 entering the socket ot' the winding-bolt b to turn the same.

The socketed winding-bolt I) is journaled in the block 41, secured between the plates E and F of the movement. The beveled pinion a of the winding-bolt engages with the spur-wheel a, which is journaled on a hub formed by chainbering out the plate F, the cogs ot' the two wheels meeting through an opening cut in the plate. This hub also forms the bearing of the oscillating yoke D, which is secured in place over the spur-wheel a by the washer h and screw j.

The oscillating yoke is formed with the extensions ]c k, which carry the gearing for winding the watch and setting the hands, consisting of the wheel m,journaled on a hub formed on the under side of extension 70, and of wheel a and the idler 0,journaled on hubs formed on the under side of extension 7c. The yoke is also formed with the, extension against which the spring 1 presses. The extension 70 is formed with a cam-face, 2, against which the long arm of the bent lever O impinges while setting the hands.

w is a wheel which carries the minute-hand and receives its motion from a wheel, a, and y is the wheel which carries the hour-hand and receives its motion from the wheel ac, connected by pinions with wheels y and m.

Normally the wheel m meshes with the arbor-wheel of the mainspring, and is thus always ready for winding by pressing down upon and turning the stem, motion being imparted through the winding-bolt and wheels at and m.

When it is desired to set the hands the stem must first be drawn out, which brings the collar e and projection 01 in contact and depresses the long end of the bent lever G, which turns the yoke and disengages the gearing from the mainspring-arbor, and connects the wheel 11 with the hand-setting train, to which motion is likewise imparted by turning the stem. As soon as pulling upon the stem ceases the yoke is thrown back to place by the spring 1.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a stem winding and setting watch, the combination of bent lever 0, having projection d on its short arm and bearing with its long arm upon the cam-shaped extension 70, the stem B, provided with collar 0, and socketed winding-bolt b, journaled in theblock between the plates E F, with the oscillating yoke D, having extensions 70 70 k", the first two carrying wheels and the last provided with a spring, as and for the purposes set forth.

JOHN GRAY OARNAHAN.

Witnesses:

J OE F. SLEEPER. 

